in 
A 
qe o‏ وون 
0 
ጩፎ 
HOT 
ASAS 
145 
all the plates the analogous parts in each species of Crinoidea, the 
Marsupites, and Comatula. Their application is as follows :— 
Superior portion of the animal. 
Column. ; 
Base of attachment. 
Fibres of attachment. 
Auxiliary side arms. 
Pelvis. 
Costal plate or joint. 
Intercostal plate or joint. 
Scapula. 
Interscapulary plate or joint. 
Irregular interscapulary plate, 
Arms. 
Cuneiform joint. 
The hand. 
The Finger. 
Tentacula. 
Excavation in the arm joints, fingers, and tentacula, for the passage of 
viscera, covered by the plated integument. 
Clavicle. 
Pectoral plates. 
Capital plates. 
Mouth capable of being protruded into an elongated proboscis, by the 
sphincter contraction of the plated integument. | ۱ 
Plated integument covering theabdominal cavity, and the excavation in 
the arms, fingers, and tentacula. 
Alimentary canal. 
Exuded indurated calcareous matter. 
UE Entrance to the alimentary canal. 
ገዣ 
X 
Y 
Z 
Impression of the auxiliary arm joints on the column. ` = 
Orifice of the mouth. 
Supposed aperture of the ovary. 
Undeveloped muscular cartilaginous parts. 
dr 
